Question

Find the length of the arc.
A. 15π mi
B. 5400π mi
C. 135π mi
D. 125π16 mi

Answer 1

A. 15π mi

Explanation:

First find the circumference

C = 2*pi*r

C = 2 * pi*18

C = 36pi

The arc is 150 degrees

The fraction of the circle is

150/360 = 5/12

Multiply this by the circumference

5/12 * 36 pi

15 pi